THE ASSEMBLY'S SHEATH FOR INDUCTIVE POWERING OF ARTIFICIAL ORGANS

The aim of this work is to design a reliable and efficient sheath for an implantable part of a device for the wireless inductive powering of artificial organs. Wireless inductive power transfer can help get rid of the problems of recharge and wired constant power supply to artificial organs. However...

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Bibliographic Details
Published in:International journal of artificial organs 2019-08, Vol.42 (8)
Main Authors: Gurov, K, Danilov, A, Mindubaev, E, Ryabchenko, E, Surkov, O
Format: Article
Language:English
Subjects:
Artificial organs
Assembly
Biocompatibility
Circuits
Durability
Eddy currents
Energy transfer
Magnetic materials
Misalignment
Organs
Overheating
Power supplies
Power transfer
Sheaths
Skin
Thermal conductivity
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Summary:The aim of this work is to design a reliable and efficient sheath for an implantable part of a device for the wireless inductive powering of artificial organs. Wireless inductive power transfer can help get rid of the problems of recharge and wired constant power supply to artificial organs. However, the design of the implantable part of the transcutaneous powering device, or so-called assembly, is complicated by the lack of a comprehensive solution of technical and medical problems. The assembly must be encapsulated in the sheath which requires the choice of a biocompatible and non-magnetic material. This eliminates the formation of eddy currents on the sheath, whereby negative influence on the energy transfer is minimized. At the same time, the material should have a low thermal conductivity (about 0.5 W / (m • K)) to prevent overheating of the tissue from the circuitry. The sheath of the assembly must have sufficient durability to protect the circuitry. The form-factor of the sheath should be minimized for the convenience of the patient (dimensions in the limit of 20 x 20 x 3 mm). The sheath was developed for the assembly prototype. The assembly provides an output power in the range 0.45…0.55 W for the axial distance between the coils in the range 10…20 mm and the lateral misalignment up to 20 mm. The calculation and measurement were performed in the air and with the samples of "skin-fat" biological objects, in order to determine and verify the sheath characteristics. We have developed and tested the assembly's sheath for inductive powering of artificial organs that meets technical and medical requirements.
ISSN:0391-3988
1724-6040